<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>csss_3d</title>
    <link href="style.css" type="text/css" rel="stylesheet" />
</head>
<body>
    <div class="container">
        <div class="piece-box">
            <div class="piece-box2"><!--新加的容器-->
                <div class="piece piece-1"></div>
                <div class="piece piece-2"></div>
                <div class="piece piece-3"></div>
                <div class="piece piece-4"></div>
                <div class="piece piece-5"></div>
                <div class="piece piece-6"></div>
            </div>
        </div>
    </div>
</body>
</html>